// -*- C -*- module RecessScrewCutout_RecessCylinder(recessdia,zbelow, h){ translate([0,0,-zbelow]) cylinder(r=recessdia/2, h=h+1, $fn=40); } RecessedScrewCutout_defaultrecessdepth_flat = -0.30; RecessedScrewCutout_defaultrecessdepth_hex = -0.60; function RecessedScrewCutout_recessdepth(recessdia, recessdepth_arg=RecessedScrewCutout_defaultrecessdepth_flat) = recessdepth_arg >= 0 ? recessdepth_arg : -recessdepth_arg * recessdia; function RecessedScrewCutout_totaldepth(recessdia, recessdepth_arg=RecessedScrewCutout_defaultrecessdepth_flat) = RecessedScrewCutout_recessdepth(recessdia, recessdepth_arg) + + 0.5*recessdia + 0.1; module RecessedScrewCutout(shaftdia, recessdia, shaftlen, zbelow=1, recessdepth_arg=RecessedScrewCutout_defaultrecessdepth_flat) { // pass recessdepth_arg=-1 for the default for flat heads // pass recessdepth_arg=-1 for the default for flat heads recessdepth = RecessedScrewCutout_recessdepth(recessdia, recessdepth_arg); recesstopz = RecessedScrewCutout_totaldepth(recessdia, recessdepth_arg); translate([0,0,-zbelow]) cylinder(r=shaftdia/2, h=shaftlen+zbelow, $fn=20); RecessScrewCutout_RecessCylinder(recessdia,zbelow, recessdepth); intersection(){ cube([recessdia + 1, shaftdia + 0.1, recesstopz*2 + 1], center=true); translate([0, -recessdia, recesstopz]) rotate([0,135,0]) cube([recessdia, recessdia*2, 10]); RecessScrewCutout_RecessCylinder(recessdia,zbelow, recesstopz+1); } } // nom. shaft // shaft slop screw_info_M2 = [2, 1.2]; screw_info_M3 = [3, 1.2]; screw_info_M4 = [4, 1.1]; screw_info_M5 = [5, 1.0]; screw_info_M6 = [6, 1.2]; function screw_shaft_dia_nom(info) = info[0]; function screw_shaft_dia_use(info) = info[0] + info[1]; function screw_recess_dia_use(info) = info[0] * 2.50 + 1.0; function screw_recess_depth(info) = info[0] * 1.00 + 0.50; function screw_recess_depth_allen(info) = info[0] * 1.55 + 0.50; function RecessedScrewCutoutStandard_totaldepth(info) = RecessedScrewCutout_totaldepth(screw_recess_dia_use(info), screw_recess_depth(info)); function RecessedScrewCutoutStandardAllen_totaldepth(info) = RecessedScrewCutout_totaldepth(screw_recess_dia_use(info), screw_recess_depth_allen(info)); module RecessedScrewCutoutStandard(info, shaftlen, zbelow=1) { RecessedScrewCutout(screw_shaft_dia_use(info), screw_recess_dia_use(info), shaftlen, zbelow, screw_recess_depth(info)); } module RecessedScrewCutoutStandardAllen(info, shaftlen, zbelow=1) { RecessedScrewCutout(screw_shaft_dia_use(info), screw_recess_dia_use(info), shaftlen, zbelow, screw_recess_depth_allen(info)); } tests = [ screw_info_M2, screw_info_M3, screw_info_M4, screw_info_M5, screw_info_M6 ]; function Test_blocksz(t) = screw_recess_dia_use(t) + 7; module OneTestCore(t, h, ymul, labelnumber=false){ blocksz = Test_blocksz(t); translate([0, ymul * (blocksz*0.5 - 1.5), 0]) { difference(){ translate([-blocksz/2, -blocksz/2, 0]) cube([blocksz, blocksz, h]); child(); } if (labelnumber) { rotate([90,0,0]) translate([-blocksz/4,blocksz/5, blocksz/2-1]) linear_extrude(height=0.3+1) import(file=str("screw-recess-test-number-s",t[0],".dxf"), convexity=100); } } } module OneTest(t){ h = RecessedScrewCutoutStandard_totaldepth(t) + 3; ha = RecessedScrewCutoutStandardAllen_totaldepth(t) + 3; OneTestCore(t, h, 1){ RecessedScrewCutoutStandard(t, h+1); } OneTestCore(t, ha, -1, true){ RecessedScrewCutoutStandardAllen(t, ha+1); } } function Test_x(i) = i<=0 ? 0 : Test_x(i-1) + Test_blocksz(tests[i-1])/2 + Test_blocksz(tests[i])/2 - 3; module Tests(){ for (i = [0:len(tests)-1]) { echo(i, Test_x(i)); translate([Test_x(i), 0, 0]) OneTest(tests[i]); } } //OneTest(tests[1]); Tests(); //Hole(); //Holes();